A puller accelerator isocenter

Abstract

The present application relates to the field of isocenter instrument, disclose a kind of pull type accelerator isocenter, comprising: support frame, two support plates are installed on support frame, angle dial and angle adjustment knob are installed on the side of support plate, angle adjustment knob is located in the center position of angle dial;Panel, installed between two support plates, angle adjustment knob is connected with panel by pivot, calibration mark line is provided on the top of panel, film positioning slot is formed in the side of panel.In the present application, by adopting pull-out plate structure, pull-out plate can be horizontally pulled out from panel, and can also be vertically moved and pulled out from panel, to realize the quick loading and unloading of film, the single film replacement time is greatly shortened, effectively reduces the idle time of equipment caused by replacing film, improves the work efficiency of isocenter calibration.

Description

Technical Field

[0001] This invention relates to the field of isocenters, and more particularly to a pull-out accelerator isocenter. Background Technology

[0002] The isocenter refers to the reference axis of various movements in a radiological device moving around a common center point. The radiation beam passes through the smallest sphere centered on this point, which is the isocenter. The deviation of the radiation beam axis relative to the isocenter point and other indicators are important items in the accelerator quality control test, and are mainly realized through the deviation of the isocenter instrument.

[0003] A search revealed that CN115607855A discloses an accelerator precision calibrator, including a substrate with etched grooves and square field lines fixedly embedded in the grooves. A positioning post is fixed on the upper surface of the substrate and is adapted to the square field lines. An isocentric scale ball and a scale ball placement device are installed on the side wall of the substrate. The isocentric scale ball is movably placed in the scale ball placement device. One side of the scale ball placement device is fixed to one side of the substrate, and the isocentric scale ball is adapted to the positioning post.

[0004] Existing isocenters generally use two acrylic plates to clamp the film, with the upper acrylic plate and the lower base secured by bolts or clips. This makes it difficult to insert the film, and the placement position cannot be consistent, leading to relative offset of the film center. Furthermore, when detecting digital indications (unit-limited beams) of the irradiation field, multiple irradiation fields ranging from 5cm×5cm to 20cm×20cm need to be detected. However, most isocenters currently on the market are designed with two building materials forming a gap for placing the dosimetry film. In accelerator quality control, the traditional setup makes it difficult to secure the film, and the building materials have a large area, meaning that only a single sheet of film can be placed for quality control, resulting in film waste and being inconvenient for practical use. Summary of the Invention

[0005] To address the aforementioned problems, the present invention is implemented through the following technical solution.

[0006] A pull-out accelerator isocenter includes: a support frame, on which two support plates are mounted, and on one side of each support plate are an angle scale and an angle adjustment knob, with the angle adjustment knob located at the center of the angle scale;

[0007] The panel is installed between two support plates. The angle adjustment knob is connected to the panel via a rotating shaft. The top of the panel has calibration marks, and one side of the panel has a film positioning groove.

[0008] A pull-out plate is connected to the film positioning slot. The pull-out plate is designed to move horizontally within the film positioning slot. A placement slot is provided on the top of the pull-out plate for placing the film.

[0009] The support frame has four feet at the bottom, a spirit level is installed on the panel, and a handle is installed on one side of the pull-out plate.

[0010] Preferably, a film positioning groove is provided at the bottom of the panel, and a connecting frame is installed at the bottom of the panel;

[0011] The pull-out plate is connected to the connecting frame. The pull-out plate is at least partially set in the film positioning groove. The pull-out plate is set to move vertically along the connecting frame and move closer to or away from the panel. The pull-out plate clamps and fixes the film to the top wall of the film positioning groove.

[0012] Preferably, the pull-out plate includes: an extrusion plate installed in a placement groove, the extrusion plate being configured to move vertically along the placement groove, a film being placed on the extrusion plate, and the extrusion plate being used to clamp the film to the top wall of the film positioning groove; and a second power source installed at the bottom of the pull-out plate, the power shaft of the second power source being connected to the extrusion plate.

[0013] Preferably, the extrusion plate includes: a fixed groove formed on the top of the extrusion plate; a rotating plate installed in the fixed groove, the rotating plate contacting the film; and a top plate installed on the bottom wall of the placement groove, the bottom wall of the fixed groove having a through hole, the top plate being located below the through hole, and the top plate being configured to pass through the through hole and drive the top plate to rotate in the fixed groove when the extrusion plate moves downward.

[0014] Preferably, the pull-out panel includes:

[0015] A trigger block is installed on the inner outer wall of the support frame;

[0016] The conversion component is installed inside the pull-out plate and contacts the trigger base block when the pull-out plate moves down to a certain position.

[0017] The connector connects the conversion assembly to the extrusion plate. The conversion assembly is pressed by the pull-out plate, which causes the transmission. The transmission of the conversion assembly then drives the extrusion plate to move through the connector.

[0018] Preferably, the conversion assembly includes a pressure plate installed inside the pull-out plate, an active toothed plate installed on the side wall of the pressure plate, a gear installed on one side of the active toothed plate, a passive toothed plate corresponding to the gear meshing with the gear, and a passive toothed plate connected to a connector on one side via a connecting plate.

[0019] Preferably, the connector includes a connecting rod disposed on the top of the connecting plate, the top of the connecting rod being connected to the bottom of the extrusion plate, a support ring being installed on the outer wall of the connecting rod, and a support spring being installed at the bottom of the support ring, the support spring being used to maintain the position of the connecting rod and the top extrusion plate.

[0020] Preferably, there are two rotating plates, which are arranged symmetrically.

[0021] Preferably, the surface of the extrusion plate is provided with a limiting protrusion for limiting the film.

[0022] This invention provides a pull-out accelerometer isocenter. Compared with the prior art, it has the following advantages:

[0023] 1. By adopting a pull-out plate structure, the pull-out plate can be pulled out horizontally from the panel or moved vertically from the panel and pulled out, realizing quick loading and unloading of film. The time for a single film replacement is greatly shortened, effectively reducing the equipment downtime caused by film replacement and improving the work efficiency of isocenter calibration. By adopting the up and down pulling method, the cooperation between the pull-out plate and the connecting frame ensures the stability of its movement process and avoids film displacement during replacement.

[0024] 2. This device reduces film waste and avoids the shortcomings of existing devices that require a whole sheet of film to be glued to a corner of a whole sheet of white paper and then placed between the two panels of the isocenter instrument. The present invention can cut different sizes according to the actual size of the irradiation field through the design of the pull-out plate groove, which can save a lot of film usage costs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure proposed in this invention.

[0026] Figure 2 This is a schematic diagram of the panel and pull-out plate proposed in this invention.

[0027] Figure 3 This is a three-dimensional structural diagram of the pull-out panel.

[0028] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0029] Figure 5 This is a bottom view of the isocenter instrument.

[0030] Figure 6 This is a schematic diagram of the cross-sections of the top plate and the rotating plate.

[0031] Figure 7 This is a schematic diagram showing the rotating state of the rotating plate.

[0032] Figure 8 This is a diagram showing the panel and pull-out panel in their open state.

[0033] Figure 9 This is a schematic diagram of the extrusion plate and the limiting protrusion.

[0034] Figure 10 This is a schematic diagram of the extrusion plate and top plate structure proposed in Example 3.

[0035] The attached figures are labeled as follows:

[0036] 100. Panel; 101. Connecting frame; 102. First power source; 103. Spirit level; 104. Film positioning slot; 200. Pull-out plate; 201. Placement slot; 202. Trigger base block; 203. Conversion component; 203a. Pressure plate; 203b. Active gear plate; 203c. Gear; 203d. Passive gear plate; 203e. Connecting plate; 204. Connector; 204a. Connecting rod; 204b. Support spring; 204c. Support ring; 205. Top plate; 206. Handle; 300. Extrusion plate; 301. Fixing slot; 302. Rotating plate; 303. Limiting protrusion; 500. Support frame; 501. Support plate; 502. Angle dial; 503. Angle adjustment knob; 504. Foot. Detailed Implementation

[0037] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0038] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0039] Example 1

[0040] Reference Figure 1 - Figure 2 A pull-out accelerator isocenter includes:

[0041] The support frame 500 has two support plates 501 installed on it. An angle scale 502 and an angle adjustment knob 503 are installed on one side of the support plate 501. The angle adjustment knob 503 is located at the center of the angle scale 502.

[0042] Panel 100 is installed between two support plates 501. Angle adjustment knob 503 is connected to panel 100 via a rotating shaft. A calibration mark line is provided on the top of panel 100. A film positioning groove 104 is provided on one side of panel 100.

[0043] A pull-out plate 200 is connected to the film positioning groove 104. The pull-out plate 200 is configured to move horizontally within the film positioning groove 104. A placement groove 201 is provided on the top of the pull-out plate 200 for placing film.

[0044] In this embodiment, the two support plates 501 are arranged in parallel. The angle adjustment knob 503 is rotated to make the connecting shaft drive the panel 100 to rotate, and the angle is adjusted. The specific rotation angle is displayed by the angle scale 502. The calibration mark line on the panel 100 is used for the positioning calibration of the radiation beam.

[0045] In this embodiment, the film can be easily replaced by pulling the horizontally pulled plate 200. The size of the placement slot 201 can be adjusted to accommodate films of different sizes, thereby avoiding film waste, saving costs, and benefiting practical use.

[0046] The support frame 500 has four feet 504 installed at its bottom, and a bubble level 103 is installed on the panel 100. A handle 206 is installed on one side of the pull-out plate 200. By adjusting the feet 504, the state of the bubble level 103 can be observed, so that the support frame 500 can be placed horizontally on the accelerator treatment bed, reducing the deviation of the panel 100 caused by the placement angle deviation of the support frame 500 and improving the accuracy of the test.

[0047] Example 2

[0048] The difference between this embodiment and Embodiment 1 is that, referring to... Figure 3 - Figure 9 A film positioning groove 104 is provided at the bottom of the panel 100, and a connecting frame 101 is installed at the bottom of the panel 100; a pull-out plate 200 is connected to the connecting frame 101, and the pull-out plate 200 is at least partially disposed in the film positioning groove 104. The pull-out plate 200 is configured to move vertically along the connecting frame 101 and move closer to or away from the panel 100. The pull-out plate 200 clamps and fixes the film to the top wall of the film positioning groove 104; a first power source 102 is installed on the connecting frame 101, and the power shaft of the first power source 102 is connected to the pull-out plate 200.

[0049] In this embodiment, the film positioning groove 104 is located at the bottom of the panel 100. Thus, the pull-out plate 200 moves vertically in the direction of movement of the film positioning groove 104, and the film is placed on the pull-out plate 200. The first power source 102 drives the pull-out plate 200 to move vertically on the connecting frame 101, which can move the pull-out plate 200 closer to the panel 100, thereby clamping and fixing the film to the top wall of the film positioning groove 104. After the pull-out plate 200 moves away from the panel 100... The film can be removed from the panel 100 and quickly replaced by pulling it vertically using the pull plate 200. Compared with the horizontal pull in Embodiment 1, the vertical pull used in this embodiment can better fix the film. The principle is that when pulling horizontally, there is a certain gap between the film and the inner wall of the film positioning groove 104, and the film is in a movable state. However, when pulling vertically, the pull plate 200 can apply pressure to the film and press it to fix it on the inner wall of the film positioning groove 104.

[0050] Specifically, the pull-out plate 200 includes: an extrusion plate 300, which is installed in the placement groove 201. The extrusion plate 300 is configured to move vertically along the placement groove 201. The film is placed on the extrusion plate 300, and the extrusion plate 300 is used to clamp the film to the top wall of the film positioning groove 104.

[0051] The aforementioned placement slot 201 is used to place components such as film and extrusion plate 300, providing space for film placement and subsequent extrusion operations.

[0052] Furthermore, the extrusion plate 300 includes: a fixing groove 301, which is formed on the top of the extrusion plate 300; a rotating plate 302, which is installed in the fixing groove 301 and contacts the film; there are two rotating plates 302, which are symmetrically arranged; and a top plate 205, which is installed on the bottom wall of the placement groove 201. The bottom wall of the fixing groove 301 has a through hole, and the top plate 205 is located below the through hole. The top plate 205 is configured to pass through the through hole and rotate within the fixing groove 301 when the extrusion plate 300 moves downward.

[0053] The aforementioned rotating plate 302 can rotate within the fixed groove 301. After the film is compressed, it will adhere to the surface of the extrusion plate 300. When replacing the film, it is difficult to remove the film from the extrusion plate 300. The top plate 205 lifts the rotating plate 302 during the downward movement of the extrusion plate 300. The rotating plate 302 can separate the film from the extrusion plate 300 and form a gap, making it convenient to remove the film from the extrusion plate 300.

[0054] The further pull-out plate 200 includes: a trigger bottom block 202, which is installed on the inner outer wall of the support frame 500;

[0055] The conversion component 203 is installed inside the pull-out plate 200. When the pull-out plate 200 moves down to a certain position, it contacts the trigger bottom block 202. The conversion component 203 is used to synchronously transmit the downward movement of the pull-out plate 200 to the extrusion plate 300, thereby facilitating the removal of the film from the extrusion plate 300.

[0056] The connector 204 connects the conversion component 203 to the extrusion plate 300. The conversion component 203 is pressed by the pull plate 200 to generate a transmission. The transmission of the conversion component 203 then drives the extrusion plate 300 to move through the connector 204.

[0057] The conversion assembly 203 includes a pressure plate 203a installed in the pull-out plate 200. An active toothed plate 203b is installed on the side wall of the pressure plate 203a. A gear 203c is installed on one side of the active toothed plate 203b. A passive toothed plate 203d is correspondingly meshed with the gear 203c. One side of the passive toothed plate 203d is connected to the connector 204 through a connecting plate 203e. The transmission function of the passive toothed plate 203d and the active toothed plate 203b is to change the transmission direction, so that the upward movement of the pressure plate 203a can drive the connecting plate 203e to move downward. The stroke can be expanded by setting the gear ratio to ensure that the film is lifted sufficiently.

[0058] The connector 204 includes a connecting rod 204a disposed on the top of the connecting plate 203e. The top of the connecting rod 204a is connected to the bottom of the extrusion plate 300. A support ring 204c is installed on the outer wall of the connecting rod 204a. A support spring 204b is installed at the bottom of the support ring 204c. The support spring 204b is used to maintain the position of the connecting rod 204a and the top extrusion plate 300. The support spring 204b applies force when the conversion component 203 is not pressed, so that the position of the support ring 204c, the connecting rod 204a and the extrusion plate 300 is maintained.

[0059] Furthermore, it also includes: a support frame 500, on which the panel 100 is mounted. The support frame 500 is the supporting base of the entire isocenter instrument. The panel 100 is mounted on the support frame 500 to provide a stable support structure for the entire instrument, ensuring the stability of the instrument during use and reducing the impact of factors such as shaking on the calibration results.

[0060] The extrusion plate 300 is equipped with a limiting protrusion 303 for limiting the film. The limiting protrusion 303 is used to limit the film to prevent displacement during placement and operation, and to ensure the accuracy of the film's position.

[0061] Operation process: When the film needs to be removed, the first power source 102 drives the pull plate 200 to move downwards. The movement of the pull plate 200 causes the pressure plate 203a to gradually approach the trigger base block 202. When the top of the pull plate 200 is exposed, its pressure plate 203a contacts the trigger base block 202. Due to the contact with the trigger base block 202, the pressure plate 203a undergoes relative displacement, which drives the active gear plate 203b to move. The movement of the active gear plate 203b drives the gear 203c to rotate. The rotation of the gear 203c drives the passive gear plate 203d to move. The movement of the passive gear plate 203d drives the connecting plate 203e to move. The movement of the connecting rod 204a causes the extrusion plate 300 to move downwards. When the extrusion plate 300 moves downwards, the top plate 205 passes through the through hole and rotates within the fixed groove 301. The rotating plate 302 can rotate within the fixed groove 301. After the film is compressed, it will stick to the surface of the extrusion plate 300. When changing the film, it is difficult to remove the film from the extrusion plate 300. The top plate 205 lifts the rotating plate 302 during the downward movement of the extrusion plate 300. The rotating plate 302 can separate the film from the extrusion plate 300 and form a gap, making it easier to remove the film from the extrusion plate 300.

[0062] Example 3

[0063] The difference between this embodiment and Embodiment 2 is that, referring to... Figure 10 The top plate 205 installed on the bottom wall of the placement groove 201 directly penetrates the extrusion plate 300. When the extrusion plate 300 moves downward, the top plate 205 passes through the extrusion plate 300 and contacts the film. The top plate 205 lifts the film, thus separating the film from the extrusion plate 300.

[0064] In summary, compared with existing technologies, it has the following beneficial effects:

[0065] By adopting the pull-out plate 200 structure, the pull-out plate 200 can be pulled out horizontally from the panel 100, or it can be moved and pulled out vertically from the panel 100, realizing the quick loading and unloading of film. The time for a single film replacement is greatly shortened, effectively reducing the equipment downtime caused by film replacement and improving the work efficiency of isocenter calibration.

[0066] By employing a pull-out mechanism in the up-down direction, the cooperation between the pull-out plate 200 and the connecting frame 101 ensures stable movement, prevents film shifting during replacement, and guarantees the consistency of the tungsten marker with the theoretical isocenter, significantly improving the accuracy of irradiation projection measurement and the reliability of calibration results.

[0067] By using the rotating plate 302 provided on the extrusion plate 300, the film attached to the extrusion plate 300 can be lifted up, making it easier to remove and replace the film.

[0068] Therefore, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the foregoing disclosure, and it should be understood that in some cases, certain features of the invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the invention. The invention is not intended to be limited to the specific terminology used in the following claims and / or the specific embodiments disclosed as the best mode for carrying out the invention, but the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the invention will be defined only by the appended claims.

Claims

1. A pull-out accelerator isocenter, characterized in that, include: The support frame (500) has two support plates (501) installed on it. An angle scale (502) and an angle adjustment knob (503) are installed on one side of the support plate (501). The angle adjustment knob (503) is located at the center of the angle scale (502). Panel (100) is installed between two support plates (501). Angle adjustment knob (503) is connected to panel (100) via a rotating shaft. A calibration mark line is provided on the top of panel (100). A film positioning groove (104) is provided on one side of panel (100). A pull-out plate (200) is connected to the film positioning groove (104). The pull-out plate (200) is configured to move horizontally within the film positioning groove (104). A placement groove (201) is provided on the top of the pull-out plate (200) for placing film.

2. The isocenter of the pull-out accelerator according to claim 1, characterized in that, The support frame (500) has four feet (504) installed at the bottom, a spirit level (103) is installed on the panel (100), and a handle (206) is installed on one side of the pull-out plate (200).

3. The isocenter of the pull-out accelerator according to claim 1, characterized in that, The bottom of the panel (100) is provided with a film positioning groove (104), and a connecting bracket (101) is installed at the bottom of the panel (100). The pull-out plate (200) is connected to the connecting frame (101). The pull-out plate (200) is at least partially disposed in the film positioning groove (104). The pull-out plate (200) is configured to move vertically along the connecting frame (101) and move closer to or further away from the panel (100). The pull-out plate (200) clamps and fixes the film to the top wall of the film positioning groove. The first power source (102) is installed on the connecting frame (101), and the power shaft of the first power source (102) is connected to the pull plate (200).

4. The isocenter of the pull-out accelerator according to claim 3, characterized in that, The pull-out panel (200) includes: An extrusion plate (300) is installed in a placement groove (201). The extrusion plate (300) is configured to move vertically along the placement groove (201). The film is placed on the extrusion plate (300). The extrusion plate (300) is used to clamp the film to the top wall of the film positioning groove.

5. The isocenter of the pull-out accelerator according to claim 4, characterized in that, The extrusion plate (300) includes: A fixing groove (301) is provided on the top of the extrusion plate (300); A rotating plate (302) is installed in a fixed groove (301), and the rotating plate (302) is in contact with the film; The top plate (205) is installed on the bottom wall of the placement groove (201). The bottom wall of the fixing groove (301) has a through hole. The top plate (205) is located below the through hole. The top plate (205) is configured to pass through the through hole and rotate in the fixing groove (301) when the extrusion plate (300) moves downward.

6. The isocenter of the pull-out accelerator according to claim 3, characterized in that, The pull-out panel (200) includes: A trigger block (202) is installed on the inner outer wall of the support frame (500); The conversion component (203) is installed inside the pull-out plate (200) and contacts the trigger base block (202) when the pull-out plate (200) moves down to a certain position; The connector (204) connects the conversion component (203) to the extrusion plate (300). The conversion component (203) is pressed by the pull plate (200) to generate a transmission. The transmission of the conversion component (203) then drives the extrusion plate (300) to move through the connector (204).

7. The isocenter of the pull-out accelerator according to claim 6, characterized in that, The conversion assembly (203) includes a pressure plate (203a) installed in a pull-out plate (200). An active toothed plate (203b) is installed on the side wall of the pressure plate (203a). A gear (203c) is installed on one side of the active toothed plate (203b). A passive toothed plate (203d) is correspondingly meshed with the gear (203c). One side of the passive toothed plate (203d) is connected to the connector (204) through a connecting plate (203e).

8. The isocenter of the pull-out accelerator according to claim 6, characterized in that, The connector (204) includes a connecting rod (204a) disposed on the top of the connecting plate (203e). The top of the connecting rod (204a) is connected to the bottom of the extrusion plate (300). A support ring (204c) is installed on the outer wall of the connecting rod (204a). A support spring (204b) is installed at the bottom of the support ring (204c). The support spring (204b) is used to maintain the position of the connecting rod (204a) and the top extrusion plate (300).

9. The isocenter of the pull-out accelerator according to claim 5, characterized in that, The number of rotating plates (302) is two, and the two rotating plates (302) are arranged symmetrically.

10. The isocenter of the pull-out accelerator according to claim 4, characterized in that, The extrusion plate (300) is fitted with a limiting protrusion (303) for limiting the film.

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